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公开(公告)号：US20160244395A1
公开(公告)日：2016-08-25
申请号：US15028109
申请日：2014-10-14
Applicant: Dow Global Technologies LLC , ROHM AND HAAS COMPANY
Inventor： Leonard E. Bogan, Jr. , Mark A. Silvano , Raymond P. Roach , Sarah M. Hoyt , Robert Tengler , David C. Decoster , Sanjib Biswas , Muhunthan Sathiosatham , Sarah L. Hruby , Andrew M. Lemonds
IPC: C07C51/377 , B01J27/24
CPC classification number: C07C51/377 , B01J27/24 , C07C57/04
Abstract: Hydroxycarboxylic acids, e.g., 3-hydroxypropionic acid, and/or their ammonium salts are dehydrated to their corresponding unsaturated carboxylic acids, e.g., acrylic acid, by a process that uses a catalyst comprising ammonium bisulfate. The use of ammonium bisulfate reduces or eliminates the problems associated with processes that use sulfuric acid as a dehydrating catalyst, e.g, excess sulfuric acid consumption and/or recovery.
Abstract translation: 通过使用包含硫酸氢铵的催化剂的方法将羟基羧酸例如3-羟基丙酸和/或其铵盐脱水成相应的不饱和羧酸，例如丙烯酸。 使用硫酸氢铵减少或消除了与使用硫酸作为脱水催化剂的方法相关的问题，例如过量的硫酸消耗和/或回收。
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Patent Agency Ranking
公开(公告)号：US20210403404A1
公开(公告)日：2021-12-30
申请号：US16613942
申请日：2018-05-24
Applicant: Rohm and Haas Company
Inventor： Reetam Chakrabarti , Sarah L. Hruby , Dmitry A. Krapchetov , Minh N. Ngo , Muhunthan Sathiosatham , Mark A. Silvano
Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.
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公开(公告)号：US10246474B2
公开(公告)日：2019-04-02
申请号：US14733016
申请日：2015-06-08
Applicant: Rohm and Haas Company
Inventor： Allen S. Bulick , Sarah L. Hruby , Muhunthan Sathiosatham
IPC: C07F9/38
Abstract: The present invention is a process for converting a phosphonate to a hydroxyalkyl phosphonic acid comprising the step of contacting together water, the phosphonate, and a sulfonated or phosphonated heterogeneous catalyst under conditions sufficient to convert at least 50% of the phosphonate to the hydroxyalkyl phosphonic acid. The process of the present invention provides a way of preparing hydroxyalkyl phosphonic acids safely and economically, without corrosive effects.
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公开(公告)号：US20200181053A1
公开(公告)日：2020-06-11
申请号：US16614512
申请日：2018-05-24
Applicant: Rohm and Haas Company
Inventor： Reetam Chakrabarti , Charles Como , Sarah L. Hruby , Dmitry A. Krapchetov , Minh N. Ngo , Muhunthan Sathiosatham , Mark A. Silvano
Abstract: Provided is a process for preparing dry methacrolein which maximizes capture of methanol. Also provided is a process for producing methyl methacrylate.
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公开(公告)号：US09701610B2
公开(公告)日：2017-07-11
申请号：US15028109
申请日：2014-10-14
Applicant: Dow Global Technologies LLC , Rohm and Haas Company
Inventor： Leonard E. Bogan, Jr. , Mark A. Silvano , Raymond P. Roach , Sarah M. Hoyt , Robert Tengler , David C. Decoster , Sanjib Biswas , Muhunthan Sathiosatham , Sarah L. Hruby , Andrew M. Lemonds
IPC: C07C51/377 , B01J27/24 , C07C57/04
CPC classification number: C07C51/377 , B01J27/24 , C07C57/04
Abstract: Hydroxycarboxylic acids, e.g., 3-hydroxypropionic acid, and/or their ammonium salts are dehydrated to their corresponding unsaturated carboxylic acids, e.g., acrylic acid, by a process that uses a catalyst comprising ammonium bisulfate. The use of ammonium bisulfate reduces or eliminates the problems associated with processes that use sulfuric acid as a dehydrating catalyst, e.g, excess sulfuric acid consumption and/or recovery.
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公开(公告)号：US20150361117A1
公开(公告)日：2015-12-17
申请号：US14733016
申请日：2015-06-08
Applicant: Rohm and Haas Company
Inventor： Allen S. Bulick , Sarah L. Hruby , Muhunthan Sathiosatham
IPC: C07F9/38
CPC classification number: C07F9/3808
Abstract: The present invention is a process for converting a phosphonate to a hydroxyalkyl phosphonic acid comprising the step of contacting together water, the phosphonate, and a sulfonated or phosphonated heterogeneous catalyst under conditions sufficient to convert at least 50% of the phosphonate to the hydroxyalkyl phosphonic acid. The process of the present invention provides a way of preparing hydroxyalkyl phosphonic acids safely and economically, without corrosive effects.
Abstract translation: 本发明是一种将膦酸酯转化为羟基烷基膦酸的方法，其包括在足以将至少50％的膦酸酯转化成羟烷基膦酸的条件下将水，膦酸酯和磺化或膦酸化的非均相催化剂接触在一起的步骤 。 本发明的方法提供了安全且经济地制备羟基烷基膦酸的方法，没有腐蚀作用。
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